duplicate symbol _OBJC_CLASS_$_AutoTableViewViewController in:
/Users/apple/Library/Developer/Xcode/DerivedData/masonry自动布局-cragjuqaxcsyhcckrysbcptlqprh/Build/Intermediates/masonry自动布局.build/Debug-iphonesimulator/masonry自动布局.build/Objects-normal/i386/ForCreateVerticalViewController.o
/Users/apple/Library/Developer/Xcode/DerivedData/masonry自动布局-cragjuqaxcsyhcckrysbcptlqprh/Build/Intermediates/masonry自动布局.build/Debug-iphonesimulator/masonry自动布局.build/Objects-normal/i386/AutoTableViewViewController.o
duplicate symbol _OBJC_METACLASS_$_AutoTableViewViewController in:
/Users/apple/Library/Developer/Xcode/DerivedData/masonry自动布局-cragjuqaxcsyhcckrysbcptlqprh/Build/Intermediates/masonry自动布局.build/Debug-iphonesimulator/masonry自动布局.build/Objects-normal/i386/ForCreateVerticalViewController.o
/Users/apple/Library/Developer/Xcode/DerivedData/masonry自动布局-cragjuqaxcsyhcckrysbcptlqprh/Build/Intermediates/masonry自动布局.build/Debug-iphonesimulator/masonry自动布局.build/Objects-normal/i386/AutoTableViewViewController.o
ld: 2 duplicate symbols for architecture i386
这个 问题是 我把 AutoTableViewViewController 头文件 写成了 .m 而不是 .h